rbxii3/firmware
1
0
Fork 0
mirror of https://github.com/meshtastic/firmware.git synced 2025-12-22 18:52:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add scaffolding to read EEPROM data from ch341

Browse Source
This commit is contained in:
Jonathan Bennett
2025-06-01 13:41:43 -05:00
committed by Tom Fifield
parent b696e083f3
commit c7dd670e61
3 changed files with 254 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/platform/portduino/ch341a_i2c.h Normal file
View File

@@ -0,0 +1,37 @@
// libUSB driver for the ch341a in i2c mode
//
// Copyright 2011 asbokid <ballymunboy@gmail.com>
#ifndef __CH341A_I2C_H__
#define __CH341A_I2C_H__
#include <stdint.h>
#define BULK_WRITE_ENDPOINT 0x02 /* bEndpointAddress 0x02 EP 2 OUT (Bulk)*/
#define BULK_READ_ENDPOINT 0x82 /* bEndpointAddress 0x82 EP 2 IN (Bulk)*/
#define DEFAULT_TIMEOUT 300 // 300mS for USB timeouts
#define IN_BUF_SZ 0x100
#define EEPROM_READ_BULKIN_BUF_SZ 0x20
#define EEPROM_READ_BULKOUT_BUF_SZ 0x65
#define CH341_CMD_I2C_STREAM 0xAA
#define CH341_CMD_I2C_STM_STA 0x74
#define CH341_CMD_I2C_STM_STO 0x75
#define CH341_CMD_I2C_STM_OUT 0x80
#define CH341_CMD_I2C_STM_IN 0xC0
#define CH341_CMD_I2C_STM_END 0x00
#define CH341_EEPROM_READ_CMD_SZ 0x65 /* Same size for all 24cXX read setup and next packets*/
struct EEPROM {
char *name;
uint32_t size;
uint16_t page_size;
uint8_t addr_size; // Length of addres in bytes
uint8_t i2c_addr_mask;
};
int32_t ch341readEEPROM_param(uint8_t *buffer, uint32_t offset, uint32_t bytestoread, uint32_t ic_size, uint32_t block_size,
uint8_t algorithm, uint32_t i2c_address, struct libusb_device_handle *handle);
#endif /* __CH341A_I2C_H__ */